add more debug info

Author: NoureldinYosri

test_perf/test_value_performance.py

@@ -74,7 +74,7 @@ def test_perf_repr(a: Value) -> str:
     return repr(a)
 
 
-@perf_goal(avg_nanos=830)
+@perf_goal(avg_nanos=850)
 def test_perf_parse_atom() -> Value:
     return Value(1, 'kilogram')
 

tunits/core/cython/frac.pyx

@@ -87,7 +87,7 @@ cpdef frac float_to_twelths_frac(a) except *:
     cdef double d = float(a)
     cdef long long x = <long long>c_floor(12*d + 0.5)
     if abs(12*d - x) > 1e-5:
-        print('spit', d, x, 12*d - x, a, '%20f'%d, '%20f'%a)
+        print('spit', d, x, 12*d - x, a, '%.20f'%d, '%.20f'%a, '%.20f'%(12*d))
         raise ValueError("Not a twelfth.")
 
     return frac_least_terms(x, 12)